Tire Pressure Monitoring Systems (TPMS) have become a standard safety feature in modern vehicles. As a seasoned auto repair expert at vcdstool.com, I’ve seen firsthand how crucial these systems are for maintaining vehicle safety and tire health. But with the increasing complexity of TPMS, many car owners and even some technicians are left wondering: does a scan tool work for tire sensors? The short answer is yes, absolutely, and they are becoming increasingly essential. Let’s delve deeper into why.
The Growing Need for TPMS Tools
The original TPMS sensors are aging, and this is leading to more maintenance needs. Just like any other component, TPMS sensors have a lifespan, primarily dictated by the battery within them.
Battery Life and Sensor Longevity
Typically, the batteries in active TPMS sensors last between 7 to 12 years. This lifespan can vary depending on driving frequency and environmental conditions. Vehicles driven more often or exposed to extreme temperatures might see shorter battery life. On average, expect sensor batteries to last around 9-10 years.
Winter Weather and TPMS Issues
As these batteries age and weaken, intermittent TPMS problems become more common. These issues often surface during the colder months. Why? Because battery voltage is directly affected by ambient temperature. Batteries are electrochemical devices, and lower temperatures reduce their voltage and output capacity. This is why you might see your TPMS light illuminate more frequently in the fall and winter. For every 10°F (approximately 5.5°C) drop in temperature, tire pressure typically decreases by 1 PSI. This pressure change can be enough to trigger a low-pressure warning from older, less sensitive TPMS sensors, or sensors with weakening batteries.
Why a TPMS Tool is No Longer Optional
In today’s automotive landscape, a TPMS tool is practically a required tool, not just a luxury, even for personal vehicle maintenance.
Basic TPMS Tool Functionality
Even a basic TPMS tool offers significant advantages. For example, I picked up an Autel TS401 for a very reasonable price. While it wasn’t a necessity at the time, it’s proven to be an invaluable addition to my toolkit. These tools allow you to quickly check tire pressure, often more conveniently than using a traditional pressure gauge. Furthermore, monitoring pressure variations can help identify slow leaks, allowing for timely tire repair and preventing potential safety hazards.
Advanced Scan Tools for Comprehensive TPMS Management
While basic TPMS tools are helpful, a more advanced scan tool, similar to a professional-grade scan tool like a Solus Ultra or newer models, is necessary for comprehensive TPMS system management. These advanced tools communicate directly with the vehicle’s TPMS module via the OBDII port and offer a wider range of functions:
- Reading and Clearing TPMS Codes: Diagnose specific issues within the TPMS system by reading diagnostic trouble codes (DTCs) and clear codes after repairs are completed.
- Activating TPMS Relearn Procedures: Essential after tire rotations or sensor replacements. These procedures ensure the vehicle’s computer recognizes the position of each sensor. Some vehicles have auto-relearn functions, while others require manual relearn initiated by a scan tool.
- Sensor Activation/Triggering: Many relearn procedures require “triggering” or “activating” each sensor to transmit its ID and pressure data to the TPMS module. TPMS tools are designed to send a signal to each sensor to initiate this transmission.
There are specialized TPMS tools that connect to the OBDII port and offer these advanced features. However, for many professionals and even serious DIYers who already own a professional-level scan tool, investing in a separate, expensive, OBDII-connected TPMS tool might be redundant. Your existing professional scan tool likely already has these capabilities, or can be enhanced with a TPMS module.
The Looming Wave of TPMS Sensor Replacements
We are on the cusp of a significant wave of TPMS sensor replacements. Due to the typical battery lifespan, a large number of original TPMS sensors are nearing the end of their service life and will require replacement in the coming years. Without at least a TPMS tool for basic triggering and ideally a professional scan tool for relearn and diagnostics, you’ll be unable to properly service these systems and might have to turn away customers or send your own vehicles elsewhere for TPMS maintenance.
Real-World TPMS Challenges and Solutions
Consider the example of Costco, a major tire retailer and, surprisingly, the largest retailer of TPMS sensors in the US. They offer TPMS sensor replacement at a competitive price. However, even large retailers can face challenges. I’ve encountered situations where Costco locations have tools that are not working or properly updated. This highlights the importance of reliable tools and technician expertise, regardless of the service provider.
Programming and Universal Sensors
For programming sensors, Autel offers universal sensors and a relatively inexpensive programming interface that connects to a computer via USB. Universal sensors and programming tools can be a cost-effective solution, especially for shops dealing with a high volume of TPMS service.
The Danger of Unclear Codes and Improper Programming
Failing to clear codes or properly program sensors can lead to significant issues. I assisted a friend with a Subaru that had intermittent TPMS errors due to low sensor batteries. She took it to Costco for sensor replacement, but they failed to program the new sensors and clear the old codes. As a result, the original low battery codes persisted alongside new errors indicating the new sensors were not communicating.
Using my Solus Ultra and Autel TS401, I was able to quickly put the TPMS system into learn mode, trigger each new sensor, and clear the old codes. Within minutes, the system was functioning correctly. This experience underscores the necessity of proper procedures and the right tools.
TPMS Tools for Everyday Use
I personally use my TS401 tool regularly to check the tire pressures on my own vehicles. It’s quicker and cleaner than using a traditional tire pressure gauge. Paying attention to pressure differences across tires can also be an early indicator of slow leaks, allowing for proactive maintenance.
Conclusion: Embrace TPMS Tools for Future Readiness
While TPMS service might not be the most profitable aspect of auto repair, it’s becoming an unavoidable part of vehicle maintenance. As the fleet of vehicles with TPMS ages, these issues will only become more prevalent. Having a TPMS tool, even for shops that don’t specialize in tire work, is a wise investment. It allows you to efficiently diagnose and address common TPMS issues, ensuring customer safety and satisfaction. Don’t be caught off guard by the TPMS wave – equip yourself with the necessary tools to handle it effectively. Active TPMS systems are here to stay and understanding how to service them, especially with the aid of scan tools, is a crucial skill for any modern auto technician or informed car owner.
